<div>{{childrenName}}</div>
<div> the count is {{this.count}}</div>
<div> 这是子组件的值 is {{this.childrenValue}}</div>
<div><span>请输入child组件的值:</span> <input type="text" [(ngModel)]="childrenValue" placeholder="子组件的值"></div>
<button (click)="doSend()">发送数据给父组件</button>
<div><button (click)="doSend2(this.childrenValue)">发送数据给父组件-带参数</button></div>

